如图所示，滑动变阻器的变阻范围为0～20Ω，闭合开关，当滑片在左端时，电压表、电

阅读理解。

     My name is Nicky. I've been a travel writer for twenty years now. It's a really interesting life. I was

only twenty-one when I started traveling. The first country I went to was Mexico. At first, I studied

Spanish for six months in Mexico City. Then I traveled to other parts of Mexico, and all over South

America. My favorite country was Peru. It has everything-great beaches, tall mountains, and forests

with lots of strange and wonderful animals. Brazil is the only South American country I've never visited,

but I'm a great fan of their football team! I hope to watch a football match in Brazil one day.

    What other countries have I been to? Well, I've been to most parts of Asia. I spent three years in

China, and I lived in India for five years. However, I've never been to Japan. My friends tell me it's

really expensive there. I like to spend my time in cheaper countries. At the moment, I'm living in Vietnam.

It's a beautiful country, and the people are very friendly. I've been living here for two years now, and I

love it!

根据短文内容，回答下列问题。

1. Why does Nicky like being a travel writer?

   ____________________________________________________________________________

2. How long did Nicky spend in Mexico City?

   ____________________________________________________________________________

3. Which part of South America has Nicky never been to?

   ____________________________________________________________________________

4. Why has Nicky never been to Japan?

   ____________________________________________________________________________

5. Why does Nicky like to live in Vietnam?

   ____________________________________________________________________________

电离层特点是（）①对频率高的无线电波吸收大，因此传播距离近②对频率低的无线电波吸收大，因此传播距离近③电离层浓度高，静区大④电离层浓度低，静区大⑤通常白天电离层浓度高，晚上低⑥晚间.白天电离层浓度不变

A.②③⑤

B.③⑤⑥

C.①③⑤

D.②④⑥

市场行为最基本的表现是( )。 A．成交价 B．成交量 C．成交时间 D．成交地点

A．Ⅰ、Ⅱ

B．Ⅰ、Ⅲ、Ⅳ

C．Ⅱ、Ⅳ

D．Ⅰ、Ⅱ、Ⅲ

个人出书时，如果该书可以分为几个部分，可通过( )进行税收筹划。

A．连载出版

B．分次刊印

C．分次支付稿酬

D．以系列丛书的形式出版

纳税评估程序包括（）。

A.确定评估对象

B.审核分析

C.举证核查

D.评估处理

E.成果反馈及完善措施